SEWING MACHINE CAPABLE OF OVERLAPPING SEAM COMPRISED OF PERFECT STITCH AND SEAM COMPRISED OF HITCH STITCH

摘要

PURPOSE: A sewing machine is characterized by providing a strong seam overlapped a seam comprised of prefect stitch and another seam comprised of hitch stitch, forming feeding pitch of one seam simultaneously with feeding pitch of another seam, providing uniform seam strength, feeding thick material certainly and being capable of using a horizontal shuttle hook like one used on a traditional sewing machine. CONSTITUTION: A sewing machine comprises: a first horizontal shuttle hook rotated clockwise or counterclockwise; a first needle; a second needle; a second horizontal shuttle hook rotated in the same direction as the first horizontal shuttle hook; an upper feeding device installed on an upper part of sewed material; and a lower feeding device installed on a lower part of the sewed material.